CVE-2023-2173 in BadgeOS Plugin
Summary
by MITRE • 08/31/2023
The BadgeOS plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 3.7.1.6. This is due to improper validation and authorization checks within the badgeos_delete_step_ajax_handler, badgeos_delete_award_step_ajax_handler, badgeos_delete_deduct_step_ajax_handler, and badgeos_delete_rank_req_step_ajax_handler functions. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to delete arbitrary posts.
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Analysis
by VulDB Data Team • 04/10/2026
The vulnerability identified as CVE-2023-2173 affects the BadgeOS plugin for WordPress, a popular platform for creating and managing badges and achievements within WordPress environments. This plugin enables users to create complex achievement systems with various badge types, ranking structures, and award mechanisms. The vulnerability stems from insufficient input validation and authorization checks within the plugin's administrative AJAX handlers, specifically targeting functions responsible for deleting different types of achievement components such as steps, awards, deductions, and rank requirements. The flaw exists in versions up to and including 3.7.1.6, making a substantial portion of WordPress installations potentially vulnerable.
The technical implementation of this vulnerability manifests through the improper handling of object references within the plugin's AJAX processing functions. When authenticated users submit requests to delete specific achievement components, the system fails to properly validate whether the requesting user has legitimate authorization to modify the target object. This insecure direct object reference allows attackers to manipulate the target object identifiers, enabling them to delete posts or achievement components that they should not have access to. The vulnerability affects the badgeos_delete_step_ajax_handler, badgeos_delete_award_step_ajax_handler, badgeos_delete_deduct_step_ajax_handler, and badgeos_delete_rank_req_step_ajax_handler functions, all of which share the same authorization flaw. The flaw directly corresponds to CWE-639, which describes Insecure Direct Object Reference vulnerabilities where insufficient authorization checks allow attackers to access objects they should not be permitted to access.
The operational impact of this vulnerability is significant for WordPress sites utilizing the BadgeOS plugin, particularly those with multiple user roles and permission levels. An authenticated attacker with subscriber-level permissions or higher can exploit this vulnerability to delete arbitrary posts within the WordPress database, potentially causing data loss, disruption of achievement systems, and compromise of site integrity. The affected functions handle critical components of the achievement system including step definitions, award records, deduction entries, and rank requirement configurations. This allows attackers to not only delete content but potentially disrupt the entire achievement infrastructure, making it impossible for legitimate users to access or maintain their badges and achievements. The vulnerability essentially provides a privilege escalation path where low-privilege users can perform administrative actions that should be restricted to higher-level administrators.
The security implications extend beyond simple data deletion, as this vulnerability can be leveraged to cause broader system disruptions and potentially facilitate further attacks. Attackers can systematically delete achievement components to break the functionality of the BadgeOS system, rendering it unusable for legitimate users. The vulnerability also aligns with ATT&CK technique T1078.004, which covers valid accounts used for privilege escalation, as the attack requires only an existing user account with subscriber permissions. Organizations should consider implementing additional security measures including regular plugin updates, monitoring of administrative actions, and role-based access controls. The vulnerability demonstrates the critical importance of proper authorization checks in web applications and the potential damage that can result from insufficient validation of user permissions. Mitigation strategies should include immediate patching of the affected plugin version, implementation of web application firewalls, and enhanced monitoring of AJAX requests to detect suspicious deletion activities.
Organizations should also consider implementing principle of least privilege configurations, ensuring that users have only the minimum permissions necessary to perform their tasks. The vulnerability highlights the importance of proper input sanitization and authorization validation in WordPress plugins, particularly those handling user-generated content and administrative functions. Security teams should conduct comprehensive audits of all installed plugins to identify similar authorization flaws and ensure that all AJAX handlers properly validate user permissions before executing administrative operations. The affected plugin versions represent a significant security risk that requires immediate attention through patch management processes and security monitoring to prevent potential exploitation by malicious actors.